I own TWO 2002 CRF450R's. One of the bike's carbs says "FCR 00 AA QA10" and the other bike's carb says "FCR 00 AA PJ15." The PJ bike was heavily modded by the previous owner, and I never noticed this carb difference before. As far as I recall, the carbs look almost identical except for one difference: On the QA10 bike (which I believe is the factory stock carb) the choke is BELOW the hot start plug in, making it very easy to reach and pull out. On the PJ15 bike, the choke is ABOVE the hot start plug in, making it darn near impossible to reach in and pull out. Anybody know what bike the PJ15 came off of? Was this another attempt by the P.O to mod his bike? What advantage does the PJ15 offer (or not offer)?